8 SYSTEM SETTINGS
225
8.4 System Correction Setting
The Analyzer is supplied from the manufacturer calibrated with the calibration
coefficients stored in its non-volatile memory. The factory calibration is used by default
for initial correction of the measured S-parameters. Such calibration is referred to as
system calibration, and the error correction is referred to as system correction.
The system correction ensures initial values of the measured S-parameters before the
Analyzer is calibrated by the user. The system calibration is performed at the plane of
the port physical connectors and leaves out of account the cables and other fixture used
to connect the DUT. The measurement accuracy of the Analyzer without its calibration
with the user setup is not rated.
Normally, the disabling of the system correction is not required for a calibration and
further measurements.
The system correction can be disabled only in case the user provided a proper
calibration for the Analyzer. The measurement accuracy is determined by user
calibration and does not depend on the system correction status. The only rule that
should be observes is to disable/enable the system correction before the user calibration,
so that the calibration and further measurement could be performed under the same
conditions.
If the system correction is disabled by the user, this is indicated in the instrument status
bar.
Note TRL calibration is not compatible with system correction.
The system correction will be automatically turned off
when TRL calibration is performed.
To disable/enable the system correction, use the following
softkeys:
System > Misc Setup > System Correction
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